Self-filling fountain-pen.



No. 756,778.- PATENTED APR. 5, 1904. R. GONK'LIN.

SELII FILLING FOUNTAIN PEN.

APPLmATIoN FILED MAB. 4. 1904.

H0 MODEL.

INVENTOR Allornej Tn: Nonms perus co. vnmxumo., wAsmNoYoN. u c.

Patented April 5, 1904.

UNITED STATES PATENT OFFICE.

ROY CONKLIN, OF TOLEDO, OHIO.

SELF-FILLING FOUNTAIN-PENl SPECIFICATION formingpart of Letters PatentNo. 756,778, dated April 5, 1904.

Application iiled March 4, 1904:. Serial No. 196,562. (No model.)

To a/ZZ whom/ it may concern.:

Be it known that I, ROY CoNkLIN, a citizen of the United States,residing at Toledo, in the county of Lucas and State of Ohio, haveinvented new and useful Improvements in Self- Filling Fountain-Pens, ofwhich the following is a specification. l

This invention relates to fountain-pens; and its object is to improvethe construction of that class of fountain-pens known as selffilling-such, for example, as the pen covered by my prior patent, No. 685,258,dated October 29, 1901. In that pen the ink-reservoir consists of aslender rubber bag inclosed in a rigid barrel or holder andcommunicating at one end with the pen-section. bar is laid along oneside of the bag between it and the barrel, and a rib on the bar projectsout through a slot in the barrel, so that by pressing on the rib the bagcan be compressed. If when so compressed the pen is dipped into a supplyof ink and the pressure on the rib is then relieved, the resiliency ofthe rubber bag causes it to resume its former expanded shape, and in sodoing it sucks itself full of ink. A

locking-ring passing through a slot in the rib I is then turned toprevent accidental inward movement of the rib and presser-bar until itis desired to refill the pen.

The presentinvention consists in anew locking device for thepresser-bar.

It comprises a tubular member rotatable on the outside 'of the barrel orholder, both of said parts being provided with interoperating portionswhich effect a longitudinal movement of the tubular membersimultaneously with its rotation and cause it to approach towardorrecede from the rib on the presserbar. By locating the rotatablememberquite near to one end of therib it will when rotated in one directionclamp the rib tightly between its adjacent edge and the opposite end ofthe slot in the barrel through which the rib projects. Rotation in theopposite direction will release the rib and leave the presser-bar freeto be pushed in to collapse the ink-reservoir.

In the accompanying drawings, Figure l is a perspective view of a penembodying my invention. Fig. 2 is a partial longitudinal section of thesame. Fig. 3 shows a modica- A pressertion of the invention, and Fig. 4is a crosssection on the line L 4, Fig. 3, on an enlarged scale.

The barrel 1 is of hard rubber or other rigid material. It incloses theink-reservoir 2 of elastic rubber. The presser-bar 3 lies along one sideof the reservoir and has a rib Lipassing out through a slot 5 in thebarrel. Adjacent to one end of the rib is located the tubular lockingdevice,which is preferably a sleeve 6, concentric with the barrel andextending from one end of the rib to or aboutto the end of the barrel.the sleeve has an internal or female screwthread engaging with anexternal or male screw-thread formed on the outer surface of the barrel.It follows that when the sleeve is rotated it will move lengthwise onthe barrel, and one end will come in contact with the adjacent end ofthe rib 4 and forcing the rib lengthwise in its slot in the barrel willclamp it tightly against the opposite end of said slot. The rib cannotthen be pushed in to collapse the ink-reservoir, but will be firmlylocked. To insure this result, the ends of the rib are For some portionof its lengthl preferably undercut a little, as shown, so as to slightlyoverlap the ends of the sleeve and the slot. To unlock the rib, thesleeve is given one or two turns in the opposite direction, which backit away from the rib and leave thelatter free to be pushed in.

In order that the cap 7 may fit both the ta- I pered end of the sleeveand opposite end of the barrel, the outside diameter of the sleeve mustbe no greater than the opposite end of the barrel. That portion of thebarrel surrounded by the sleeve must, therefore, be reduced in diameterto receive the sleeve. This reduced portion extends to a pointslightly.A

beyond the end of the rib, where a shoulder 8 is formed, which the endof the sleeve almost touches when the rib is locked, thus preserving theuniform size of the barrel from end to end. For convenience inmanufacture both IOO @ring only a small screw-threaded portion of thebarrel and having an internal screw-thread engaging therewith. The ringispreferably large enough to encirclethe barrel without reducing thelatter in diameter. One edge of the ring is close to one end of the rib,so that o when the ring is screwed toward the rib it will lock itagainst the opposite end of its slot.

Having thus described my invention, what IO I claim is- 1. In aself-filling fountain-pen, the combination with a barrel having a slot,of an elas tic ink-reservoir in said barrel, a presser-bar having a ribprojecting through said slot, and rotatable means for forcing said riblengthwise against one end of said slot.

2. In a self-filling fountain-pen, the combination with a barrel havinga slot, of an elastic ink-reservoir in said barrel, a presser-bar 2Ohaving a rib projecting through said slot, and

a rotatable locking member abutting against one end of said rib andoperating to force said rlib lengthwise against the opposite end of saidS ot.

3. In a self-filling fountain-pen, the combination with a barrel havinga slot, of a flexible ink-reservoir in said barrel, a presser-barhavinga rib projecting through said slot, a tubular locking memberrotatable on said barrel, and means for effecting a longitudinalmovement of said locking member when rotated to cause it to engage withone end of said rib.

4. In a self-filling fountain-pen, the combi.

nation with a barrelhaving a slot and provided with externalscrew-threads, of a flexible ink-reservoir in said barrel, a presser-barhaving a rib projecting through said slot, and

a tubular rib-locking member rotatable on scribing witnesses.

E OY CONKLIN.

Witnesses:

THOMAS DURANT, ALEXANDER S. STEWART.

